diff --git a/PIL/BmpImagePlugin.py b/PIL/BmpImagePlugin.py
index 30ca10971..793bd8edd 100644
--- a/PIL/BmpImagePlugin.py
+++ b/PIL/BmpImagePlugin.py
@@ -279,3 +279,5 @@ Image.register_open(BmpImageFile.format, BmpImageFile, _accept)
 Image.register_save(BmpImageFile.format, _save)
 
 Image.register_extension(BmpImageFile.format, ".bmp")
+
+Image.register_mime(BmpImageFile.format, "image/bmp")